<header>
  <%= image_tag("logo.png", :alt => "Sample App", :class => "round") %>
  <nav class="round">
    <ul>
      <li><%= link_to "Home", '#' %></li>
      <li><%= link_to "Help", '#' %></li>
      <% if is_logged_in? %>
        <li>Logged in as: <i><%= logged_in_user.username %></i></li>
        <li><%= link_to "Logout", logout_path %></li>
      <% else %>
        <li><%= link_to "Login", login_path %>
        <li><%= link_to "Signup", signup_path %>
      <% end %>
    </ul>
  </nav>
</header>